<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>盒子宽高+border</title>
		<style type="text/css">
			/*盒子高度=本身高+上下边线的高度*/
			.box{
				height:40px;
				border-top:3px solid #ff8500;
				border-bottom: 1px solid #edeef0;
			}
		</style>
	</head>
	<body>
		<div class="box"></div>
	</body>
</html>
